Induced Delusional Disorder (Folie à Deux)

Induced delusional disorder (folie à deux) is the development of a shared delusional belief between two closely related, socially isolated persons (often siblings or a couple), where the secondary person adopts the delusion of the primary case. The secondary person usually improves when separated. Treatment: separate the pair, treat the primary case (antipsychotic), and supportive psychotherapy for the secondary.

Common Symptoms

Shared delusion between two close persons; social isolation; dependence on the primary case; secondary improves on separation

Causes and Pathogenesis

Intense emotional dependence and social isolation allow the delusion of a primary, more dominant person to be induced in a suggestible secondary person.

Treatment

Separate the pair; treat primary case with antipsychotic; supportive psychotherapy for secondary

Preventive Measures

Reduce social isolation; family awareness; early detection of the primary case.

Department to Visit

It is recommended to visit the Psychiatry department; an appointment can be booked on this platform before the visit.

Warm reminder: The above information is for health science reference only and cannot replace professional medical diagnosis. If you have related symptoms, please seek medical attention at a regular hospital promptly.